Renesas Electronics 670M-04ILF Clock Synchronizer Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 670M-04ILF is a Clock Synchronizer with Zero Delay Buffer functionality, designed for synchronization applications requiring precise clock distribution at frequencies up to 210MHz. This 16-SOIC surface mount device operates across a 3V to 5.5V supply range and is classified as obsolete. Due to its obsolete status and limited availability in new production cycles, identifying functionally compatible substitute components is essential for ongoing system support and new design implementations.

Key Parameters

Parameter	670M-04ILF
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock Synchronizer, Zero Delay Buffer
Frequency - Max	210MHz
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
PLL	Yes
Input:Output Ratio	1:1
Output Type	CMOS
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the 670M-04ILF is determined by the following critical parameters:

Functional Compatibility Criteria:

PLL-based clock generation or synchronization capability
Maximum frequency rating equal to or exceeding 210MHz
Supply voltage range compatibility or overlap with 3V ~ 5.5V
Operating temperature range of -40°C ~ 85°C or broader
Surface mount packaging suitable for PCB integration

Regulatory & Compliance Alignment:

RoHS3 compliance status
REACH unaffected classification
Equivalent or superior MSL rating

The substitute part 5P35023B-000NLGI meets these criteria through its active product status, higher frequency capability (500MHz), PLL with bypass functionality, and multi-voltage supply support across the original operating range. While the package format differs (24-VFQFN vs. 16-SOIC), the electrical performance parameters and compliance certifications establish functional equivalence for clock distribution applications.

Parameter Comparison

Parameter	670M-04ILF	5P35023B-000NLGI
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Category	Clock/Timing	Clock/Timing
Frequency - Max	210MHz	500MHz
Voltage - Supply	3V ~ 5.5V	1.71V ~ 1.89V, 2.375V ~ 2.625V, 3.135V ~ 3.465V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
PLL	Yes	Yes with Bypass
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The 5P35023B-000NLGI is the designated manufacturer-recommended substitute for the 670M-04ILF. Selection of this alternative is justified on the following engineering grounds:

Product Lifecycle Status: The 670M-04ILF is classified as obsolete, whereas the 5P35023B-000NLGI maintains active production status, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and hazardous substance requirements for equivalent applications.

Operational Parameters: The substitute component operates within the original temperature range (-40°C ~ 85°C) and supports voltage supplies that overlap with the primary operating range of the original part. The 5P35023B-000NLGI provides enhanced frequency capability (500MHz vs. 210MHz), enabling compatibility with higher-speed clock distribution requirements.

Reliability Metrics: The substitute part carries an MSL rating of 1 (Unlimited), representing superior moisture sensitivity performance compared to the original MSL 3 rating, reducing handling and storage constraints.

Packaging Consideration: PCB layout redesign is required due to package format change from 16-SOIC to 24-VFQFN. Pin-to-pin functional mapping must be verified during integration.

Frequently Asked Questions (FAQ)

Q: Can the 5P35023B-000NLGI directly replace the 670M-04ILF without PCB modifications?

A: No. The package formats differ (16-SOIC vs. 24-VFQFN), requiring PCB layout redesign and pin reassignment. Functional compatibility is established, but physical integration requires engineering review.

Q: What is the primary reason for substitution?

A: The 670M-04ILF is obsolete. The 5P35023B-000NLGI is the active equivalent from the same manufacturer, ensuring continued supply and support.

Q: Are the voltage supply ranges compatible?

A: Partial compatibility exists. The original part operates at 3V ~ 5.5V. The substitute supports 3.135V ~ 3.465V (overlapping range) plus additional voltage rails at 1.71V ~ 1.89V and 2.375V ~ 2.625V. System voltage requirements must be verified.

Q: What is the significance of the MSL rating difference?

A: The substitute part's MSL 1 rating (Unlimited) eliminates moisture sensitivity constraints during storage and handling, compared to the original MSL 3 (168 Hours). This reduces logistics complexity and extends shelf life.

Q: Does the substitute support the same input:output ratio?

A: No. The original part operates at 1:1 ratio, while the substitute supports 1:6 ratio with divider/multiplier capability. System clock distribution architecture must accommodate this functional difference.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both the 670M-04ILF and 5P35023B-000NLGI maintain ROHS3 compliance and REACH unaffected status.

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